There are 3 good current options that spring to mind.
Most chairs that have elevate, tilt, recline, power legs are around 180 to 190KG. Without, maybe 90kg...
Those are the sunrise Q500R, Q700R (I just bought one) and the Dietz chairs.
viewtopic.php?f=2&t=9873In every case they are R-Net which means they can be properly programmed. And all of those can have a centre power footrest option which in my view is essential. It makes the chair shorter as your heels go between caster wheels, and removes the "corners".
Lithium will save maybe 54lb. But will be a diy solution. And give 5x the range.
Q700R with centre powr footrest and all the power options. 6 pages of it but shows whats wrong with it and how I sorted it. I bought a eBay one, new, but 3 months old! Unused. It has the wrong "legs" so I got them to fit a centre footplate in the deal. And I then made a few simple minor changes to suit me. You wont have to. Just dont get the curb climber!
viewtopic.php?f=2&t=10062